123210173221249 has 2 divisors, whose sum is σ = 123210173221250. Its totient is φ = 123210173221248.

The previous prime is 123210173221159. The next prime is 123210173221271. The reversal of 123210173221249 is 942122371012321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106176393381249 + 17033779840000 = 10304193^2 + 4127200^2 .

It is a cyclic number.

It is not a de Polignac number, because 123210173221249 - 2³⁵ = 123175813482881 is a prime.

It is a super-2 number, since 2×123210173221249² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123210173228249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605086610624 + 61605086610625.

It is an arithmetic number, because the mean of its divisors is an integer number (61605086610625).

Almost surely, 2^{123210173221249} is an apocalyptic number.

It is an amenable number.

123210173221249 is a deficient number, since it is larger than the sum of its proper divisors (1).

123210173221249 is an equidigital number, since it uses as much as digits as its factorization.

123210173221249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 123210173221249 in words is "one hundred twenty-three trillion, two hundred ten billion, one hundred seventy-three million, two hundred twenty-one thousand, two hundred forty-nine".